Abstract
The effects of exogenous NaCl and silicon on activities of antioxidative enzymes in the root, shoot and leaf of two alfalfa cultivars were investigated in two alfalfa ( Medicago sativa L.) cultivars: the high salt tolerant Zhongmu No. 1 and the low salt tolerant Defor. Both cultivars were grown in a hydroponics system with control (no NaCl and no Si added), Si treatment (1 mM Si), NaCl treatment (120 mM NaCl), and Si and NaCl treatment (120 mM NaCl + 1 mM Si). After 15 days of the NaCl and Si treatments, four plants of the cultivars were removed and divided into root, shoot and leaf parts for activity of antioxidative enzyme measurements. Salinity changed the antioxidative enzyme activity to different extents in the root and shoot of both cultivars when Si was not applied. Applying Si to both cultivars under NaCl stress significantly increased ascorbate peroxidase (APX) activity in root, shoot and leaves, and catalase (CAT) activity in leaves, and peroxidase (POD) activity in shoots of both cultivars, but decreased the superoxide dismutase (SOD) activity in shoots of Zhongmu No.1 and roots of both cultivars under salt stress. It is concluded that the changes of antioxidative enzymes activity varied in different organs of alfalfa plant after salt stress, while silicon could alter the activity of antioxidative enzyme of one or several organs of plants to improve the salt tolerance.
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Claims 6
Claim · model-written summary
Salinity changed antioxidant enzyme activity in roots and shoots of both cultivars without silicon.
- Taxon
- alfalfa
Medicago sativat0 - Organ / stage
- root and shoote0
- Treatment
- Salinitye0
- Outcome
- antioxidative enzyme activitye0
- Comparator
- when Si was not appliede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity changed the antioxidative enzyme activity to different extents in the root and shoot of both cultivars when Si was not applied.”
t0“alfalfa”
Claim · model-written summary
Silicon under salt stress increased APX activity in root, shoot and leaves of both cultivars.
- Taxon
- alfalfaMedicago sativat0
- Organ / stage
- root, shoot and leavese0
- Treatment
- Applying Sie0
- Gene
- ascorbate peroxidase (APX)e0
- Outcome
- ascorbate peroxidase (APX) activitye0
- Direction
- increasede0
- Comparator
- under NaCl stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying Si to both cultivars under NaCl stress significantly increased ascorbate peroxidase (APX) activity in root, shoot and leaves”
t0“alfalfa”
Claim · model-written summary
Silicon under salt stress increased leaf CAT activity in both cultivars.
- Taxon
- alfalfaMedicago sativat0
- Organ / stage
- leavese0
- Treatment
- Applying Sie1
- Gene
- catalase (CAT)e0
- Outcome
- catalase (CAT) activitye0
- Direction
- increasede1
- Comparator
- NaCl stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“catalase (CAT) activity in leaves”
t0“alfalfa”
e1“Applying Si to both cultivars under NaCl stress significantly increased ascorbate peroxidase (APX) activity in root, shoot and leaves, and catalase (CAT) activity in leaves, and peroxidase (POD) activity in shoots of both cultivars, but decreased the superoxide dismutase (SOD) activity in shoots of Zhongmu No.1 and roots of both cultivars under salt stress.”
Claim · model-written summary
Silicon under salt stress increased shoot POD activity in both cultivars.
- Taxon
- alfalfaMedicago sativat0
- Organ / stage
- shootse0
- Treatment
- Applying Sie1
- Gene
- peroxidase (POD)e0
- Outcome
- peroxidase (POD) activitye0
- Direction
- increasede1
- Comparator
- NaCl stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peroxidase (POD) activity in shoots of both cultivars”
t0“alfalfa”
e1“Applying Si to both cultivars under NaCl stress significantly increased ascorbate peroxidase (APX) activity in root, shoot and leaves, and catalase (CAT) activity in leaves, and peroxidase (POD) activity in shoots of both cultivars, but decreased the superoxide dismutase (SOD) activity in shoots of Zhongmu No.1 and roots of both cultivars under salt stress.”
Claim · model-written summary
Silicon under salt stress decreased shoot SOD activity in Zhongmu No.1.
- Taxon
- alfalfaMedicago sativat0
- Material
- Zhongmu No.1e0
- Organ / stage
- shootse0
- Treatment
- Applying Sie1
- Gene
- superoxide dismutase (SOD)e0
- Outcome
- superoxide dismutase (SOD) activitye0
- Direction
- decreasede0
- Comparator
- NaCl stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased the superoxide dismutase (SOD) activity in shoots of Zhongmu No.1”
t0“alfalfa”
e1“Applying Si to both cultivars under NaCl stress significantly increased ascorbate peroxidase (APX) activity in root, shoot and leaves, and catalase (CAT) activity in leaves, and peroxidase (POD) activity in shoots of both cultivars, but decreased the superoxide dismutase (SOD) activity in shoots of Zhongmu No.1 and roots of both cultivars under salt stress.”
Claim · model-written summary
Silicon under salt stress decreased root SOD activity in both cultivars.
- Taxon
- alfalfaMedicago sativat0
- Organ / stage
- rootse0
- Treatment
- Applying Sie1
- Outcome
- superoxide dismutase (SOD) activitye1
- Direction
- decreasede1
- Comparator
- salt stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of both cultivars under salt stress”
t0“alfalfa”
e1“Applying Si to both cultivars under NaCl stress significantly increased ascorbate peroxidase (APX) activity in root, shoot and leaves, and catalase (CAT) activity in leaves, and peroxidase (POD) activity in shoots of both cultivars, but decreased the superoxide dismutase (SOD) activity in shoots of Zhongmu No.1 and roots of both cultivars under salt stress.”
The same questions in other papers
silicon atom · physiology: antioxidant enzymes · Medicago sativa (alfalfa)Results differ
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.